Installation

Summary

Requirements

Pyrseas provides tools for PostgreSQL,
so obviously you need PostgreSQL to start with. Pyrseas has been
tested with PG 8.4, 9.0, 9.1 and 9.2, and we'll certainly keep up with
future releases. Please refer to section III, Server Administration of
the PostgreSQL documentation for details on installation, setup and
the various Linux, Unix and Windows platforms supported.

You will also need Python. Pyrseas has been tested with Python 2.6 and 2.7, but should also work with 2.5.
It has also been ported to Python 3.2.
On Linux or *BSD, Python may already be part of your
distribution or may be available as a package. For Windows and Mac OS
please refer to the Python download page for installers and instructions.

Pyrseas talks to the PostgreSQL DBMS via the Psycopg2 adapter.
Pyrseas has been tested with psycopg2
2.2 and 2.4. Psycopg2 is available as a package on most Linux or
*BSD distributions and can also be downloaded or installed from PyPI.
Please refer to the Psycopg download page for more details.

Note

If you install Pyrseas using pip (see below) and you
have not already installed Psycopg2, e.g., when installing into a
virtualenv environment created with --no-site-packages, you
will need to have installed the PostgreSQL and Python development
packages, and a C compiler, as pip will download and attempt to
build and install psycopg2 before installing Pyrseas.

The Pyrseas utilities rely on PyYAML, a YAML
library. This may be available as a package for your operating system
or it can be downloaded from the Python Package Index.

Downloading

You can download the distribution from PyPI in gzip-compressed tar or
ZIP archive format, but you can download and install it using either
Pip or Easy Install. See Python Installers below for
details.

PGXN provides a ZIP archive which you can download or you can download
and install using the PGXN client (see PGXN Client below).

PgFoundry offers the distribution in gzip-compressed tar or ZIP
archive format, which can be downloaded and then installed as
described below.

The GitHub repository holds the Pyrseas source code, tagged according
to the various releases, e.g., v0.2.0, and including unreleased
modifications. To access it, you need Git
which is available as a package in most OS distributions or can be
downloaded from the Git download page. You can fetch the Pyrseas sources by
issuing one of the following commands:

git clone git://github.com/jmafc/Pyrseas.git

or:

git clone https://github.com/jmafc/Pyrseas.git

This will create a Pyrseas directory tree (you can use a different
target name by adding it to the above commands). To list available
releases, change to the subdirectory and invoke git tag. To
switch to a particular release, use:

git checkout vn.n.n

where vn.n.n is the release identifier. Use git checkout master
to revert to the main (master) branch. To fetch the latest updates,
use:

git pull

Installation

Extracting Sources

Once you have downloaded an archive from PyPI, PGXN or PgFoundry, you
need to extract the sources. For a gzip-compressed tar file, use:

tar xzf Pyrseas-n.n.n.tar.gz

where n.n.n is the release version. For a ZIP archive, use:

unzip Pyrseas-n.n.n.zip

Both commands above will create a directory Pyrseas-n.n.n and you
will want to cd to it before proceeding with the installation.

Installing

If you have superuser or similar administrative privileges, you can
install Pyrseas for access by multiple users on your system. On Linux
and other Unix-flavored systems, you can install from the extracted
Pyrseas-n.n.n source directory or from the root directory of the
git clone, using the following command:

sudo python setup.py install

That will install the dbtoyaml </dbtoyaml> and yamltodb
</yamltodb> utility scripts in a directory such as
/usr/local/bin. The library sources and bytecode files will be
placed in a pyrseas subdirectory under site-packages or
dist-packages, e.g.,
/usr/local/lib/python2.6/dist-packages/pyrseas.

On Windows, from an account with Administrator privileges, you can
use:

python setup.py install

That will install the Pyrseas utilities in the Scripts folder of
your Python installation. The source and bytecode files will go in
the site-packages folder, e.g.,
C:\Python27\Lib\site-packages\pyrseas.

Python Installers

You can also download and install Pyrseas using pip or easy_install. For
example, on Linux do:

sudo pip install Pyrseas

or:

sudo easy_install Pyrseas

If this is the first time you are installing a Python package, please
do yourself a favor and read and follow the instructions in the
"Distribute & Pip" subsection of the "Installing Python on ..."
section for your platform of the The Hitchhiker’s Guide to Python!.

Note

On FreeBSD, it has been reported that it is necessary to
install the Python distribute package, prior to
installing Pyrseas with pip. This may also be necessary
on other BSD variants. See the Hitchhiker's Guide above
for further details.

Note

On Windows 64-bit, it has been reported that it is necessary
to obtain unofficial versions of the distribute and
PyYAML packages, available at University of California,
Irvine. For a
detailed tutorial, see this post.

Pip and easy_install can also be used in a Python virtualenv environment, in which case
you don't need to prefix the commands with sudo.

Pip also provides the ability to uninstall Pyrseas.

PGXN Client

The PGXN client (available
at PyPI) can be used to download and install Pyrseas from PGXN. Usage
is: